Window fastener



)7 i! a r;

uteri Nov. ale,

that

wrivnow rasrrnr nn.

Application filed. as, 20, 1921. "serial No. 471,031.

teners, of which the following is a specification, reference being had to the accompanying drawings.

This invention relates to window fasteners and has for its object to providea de-.

vice of this character which not only looks the window but holds it in any position desired. Another object is to provide a window fastener of this character which is automatically operable to lock the window and manually operable to permit movement of the window in the desired direction.

fastener of this character including a pair of locking bolts adapted to engage. a rack carried by the windowframe, the locking bolts being constantly urged intov engagement with the rack to prevent movement of the window and operable alternately to permit movement of, the window in the desired direction.

A still further object of the invention is to provide a fastener of this character including a pair of locking bolts and means for alternately operating said bolts whereby one of the bolts is retracted to permit the remaining bolt to ride freely over the rack upon movement of the window in the desired direction.

With the above and other objects in view, the invention consists in the improved construction and arrangement of parts to be 40 hereinafter more particularly described, fully claimed and illustrated in the accompanying drawings, in which Figure l is a view in elevation of a window frame and sash showing the invention applied, 1 i I Figure 2 is a side elevation of the lock, with one side of the lock casing removed,

Figure 3 is an end elevation, and

Figure 4 is a side elevation showing one of the movements of the lock.

Referring to the drawings, A designates a window frame and B the window sash. Disposed within one of the stiles of the window frame A is a rack 5, said rack having substantially ll-shaped teeth to permit lock- Another object is to provide a window' ing of the window either in its raised or lowered position. his rack is secured by means of screws 6 and is countersunk within the stile of the window frame so as to permit unobstructed movement of the window.

In order to secure the window in various positions, there is provided a novel form of fastener comprising a casing 7, one end of'thecasing being closed by a plate 8 having a plurality of aligned slots 9. The casing 7 is adapted to be countersunk in one of the rails of the window sash so that the outer face of the .plate A lies flush with the rail of the window sash to eliminate "projections and prevent resistance to permit lateral movement ofthe ends 12 of the bolt'upoii actuation of the Look.

The latch bolts 10 are normally held in their extended or locked position by means of a spring 13, said spring being substan tially semicircular and having its ends engaged with the bolts so as to normally hold them' in engagement with the inner end walls of the slots 9. ,lVhen the bolts are in this position it is impossible to move the sash in either direction, as the ends 12 are disposed iirmly in engagement with the teeth of the rack 5. In order to permit movement of the sash in the desired direction, there is provided a novel form of tumbler 1a, the tumbler having oppositely extending fingers 15, each of which is arranged to engage one of the bolts 10, the body portion of the tumbler adjacent the finger 15 being cut away to receive the pivotal ends 11 of the bolts. The tumbler 14 is provided with a socket member 16 which projects beyond the sides of the tumbler and through the sides of the casing to serve as trunnions for the tumbler. A stem 17 extends from the end wall of the socket in spaced relation to the side walls thereof and is adapted to properly position the operating member 18 by means of which the lock is actuated.

In the operation of the device, as previously stated, the bolts are normally maintained in the position shown in Figure 2. Hit is desired to raise the window, the operating member is inserted in the socket 16 .the movement of the window sash. A pair vent movement in either direction.

and turns toward the window sill, thereby swinging the uppermost bolt within the casing and permitting the lowermost bolt to slide similar to a ratchet over the rack 5. Any tendency of the window to descend will of course be arrested by the lowermost bolt as it will not permit downward movement of the window when engaged with the rack. When the operating member 18 is released the uppermost bolt automatically swings into engagement with the rack, thereby preventing further movement and cooperating with the lowermost bolt to pre- When it is desired to lower the window, the operation is reversed, the lowermost bolt is swung inwardly of the casing by means of the tumbler 14 and member 18 so as to per mit the uppermost bolt to slideover the rack until. the window reaches the desired point.

.An important feature of this window fastener is that it notonly securely locked the window in any position but also eliminates the use of sash weights as it is impossible for the window to accidentally descend when this look is applied as it does not depend on the operator to lock the same but works automatically. In addition to this the member 18 .is relatively large so as to permit a firm grip to beobtained and not only operates the look but provides a handle for the raising and lowering .of the window. Furthermore, it is impossible for thislock to be picked or manipulated from the outside as it is practically concealed within the rail of the'window sash.

Another important feature is that the bolts 10 do not slide but swing inwardly and outwardly of the casing, the ends 12 being rounded so as to permit the bolt to move freely through the slot without coming in contact with the casing, and the look only requires the use of one tumbler for its operation. All of these features are possessed by a device that is compact and simple in construction.

What is claimed, is

A window fastener of the character described comprising a casing having spaced openings in one end wall thereof, bolts pivoted in said casing at one of their corre sponding ends and extending through said openings substantially in divergent relation to each other, a tumbler journaled within the casing beyond the pivoted ends of the bolts and substantially between said pivoted ends and the opposite end wall of the easing, the shank of said tumbler extending between and inwardly of the pivoted ends of the bolts, the free end of said shank having fingers projecting therefrom in opposite directions for engagement with the intermedi ate portions of the bolts, and aleaf spring disposed within said casing and substantially embracing the tumbler and the pivoted end portions of the bolts, the end portions of said spring being adapted to ena the intermediate portions of'the bolts remote from the intermediate portion of the bolts engaged by the fingers of the tumbler.

In testimony whereof I hereunto affix my signature.

CHARLES A. SCHMITT. 

